– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 9 pm Tue 16 Dec Local TimeUpdates in: hr min sUpdate imminent
Issued: 9 pm Tue 16 Dec Local Time
Updates in:
Update imminent hr min s
Issued: 9 pm Tue 16 Dec Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryMild with heavy rain (total 48mm), heaviest during Tue night. Becoming colder with a moderate fall of snow heaviest on Fri afternoon. Freeze-thaw conditions (max 9°C on Tue night, min 0°C on Thu night). Winds decreasing (strong winds from the WSW on Tue night, light winds from the SW by Wed afternoon). | Days 5–7 Weather SummaryMild with heavy rain (total 64mm), heaviest during Sat night. Becoming colder with a moderate fall of snow heaviest on Sat night. Freeze-thaw conditions (max 3°C on Sat night, min 0°C on Fri night). Wind will be generally light. | ||||||||||||||||||
Wednesday 17 | Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | ||||||||||||||
night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  |  | | | | | | | | |  | | | | | | |
light snow | light snow | mod. rain | mod. rain | light rain | mod. rain | light snow | light snow | light snow | light snow | light snow | mod. rain | light snow | heavy rain | light snow | light snow | light snow | light snow | light snow | |
km/h | |||||||||||||||||||
 |  |  |  |  |  |  | |||||||||||||
1 | 1 | — | — | — | — | 3 | 5 | 5 | 5 | 1 | — | 4 | — | 1 | 5 | 1 | 1 | 5 | |
15 | 3 | 6 | 6 | 4 | 9 | 4 | — | — | — | 3 | 8 | 19 | 20 | 9 | 1.4 | 1.3 | 3 | — | |
max°C | 9 | 2 | 2 | 3 | 3 | 5 | 3 | 1 | 1 | 1 | 2 | 2 | 3 | 2 | 2 | 2 | 2 | 2 | 1 |
min°C | 1 | 2 | 2 | 2 | 3 | 4 | 0 | 1 | 1 | 0 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 0 |
-6 | -3 | -1 | -1 | 0 | 0 | -4 | -2 | -2 | -2 | -2 | -2 | -2 | -1 | -1 | -2 | -2 | -2 | -4 | |
2050 | 800 | 850 | 1000 | 1050 | 1450 | 650 | 650 | 700 | 450 | 750 | 850 | 950 | 850 | 900 | 750 | 800 | 850 | 650 | |
Cloud base (m) | 450 | 600 | 600 | 550 | 500 | 500 | 550 | 650 | 550 | 550 | 550 | 550 | 550 | 550 | 550 | 550 | 550 | 550 | 550 |
 | — | 7:54 | — | — | 7:56 | — | — | 7:56 | — | — | 7:56 | — | — | 7:58 | — | — | 7:58 | — | — |
 | — | — | 4:12 | — | — | 4:12 | — | — | 4:13 | — | — | 4:13 | — | — | 4:14 | — | — | 4:14 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Mild with heavy rain (total 48mm), heaviest during Tue night. Becoming colder with a moderate fall of snow heaviest on Fri afternoon. Freeze-thaw conditions (max 9°C on Tue night, min 0°C on Thu night). Winds decreasing (strong winds from the WSW on Tue night, light winds from the SW by Wed afternoon).
South Twin Sister Weather (Days 3-6):
Mild with heavy rain (total 64mm), heaviest during Sat night. Becoming colder with a moderate fall of snow heaviest on Sat night. Freeze-thaw conditions (max 3°C on Sat night, min 0°C on Fri night). Wind will be generally light.
This table gives the weather forecast for South Twin Sister at the specific elevation of 500 m. Our advanced weather models allow us to provide distinct weather forecasts for several elevations of South Twin Sister. To see the weather forecasts for the other elevations, use the tab navigation above the table. For a wider overview of the weather, consult the Weather Map of Washington.
| Weather Station | Temp. | Weather | Wind | Gusts | Cloud / Visibility |
|---|---|---|---|---|---|
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* NOTE: not all weather observatories update at the same frequency which is the reason why some locations may show data from stations that are further away than known closer ones.